Mixtures of blue azo disperse dyestuffs

ABSTRACT

Mixtures of dyestuffs of the formulae I to IV ##STR1## wherein the radicals have the meanings customary in dyestuff chemistry, are excellent substitute products for the expensive anthraquinone dyestuff Disperse Blue 56.

This application is a continuation, of application Ser. No. 362,912,filed Jun. 8, 1989, now abandoned.

The present invention relates to mixtures of azo dyestuffs for dyeinghydrophobic synthetic fibres which are suitable for example assubstitutes for anthraquinoid C.I. Disperse Blue 56 (C.I. No. 63 285) orfor dyestuffs with a hue angle h_(ab) of about 295° (based on apolyester dyeing in a 1/1 standard depth of shade according to DIN5033/3).

Disperse Blue 56 is regarded worldwide as an important blue dispersedyestuff since it produces particularly bright reddish blue dyeings withhigh light fastness on the abovementioned fibre materials. On the otherhand this dyestuff does display a number of disadvantages:

As with almost all anthraquinone dyestuffs Disperse Blue 56 has a lowcolouring strength which leads to a considerable increase in costespecially where high depths of colour are required.

When dyeing mixtures of polyester fibres and wool, cotton andregenerated cellulose, these accompanying fibres become highly soiled.Even reductive aftertreatment does not completely remove this soiling.

When dyeing is carried out by means of modern rapid dyeing methods thereis a high risk of uneven dyeing. Disperse Blue 56 is one of those typesof disperse blue dyestuffs which even out particularly poorly, unless anexcessive dyeing time is employed for subsequent levelling.

A further disadvantage is the sensitivity of Disperse Blue 56 towardsmetal ions--in particular copper--in the dye bath, for which reasoncomplexing agents frequently have to be added to the latter.

In order to at least partly eliminate the deficiencies of theanthraquinone dyestuff it has already been proposed to replace DisperseBlue 56 by selected blue azo dyestuffs (cf. O. Annen. R. Egli, R.Hasler, B. Henzi, H. Jakob and P. Matzinger REV. PROGR. COLORATION, 72Vol 17 (1987)) and by special mixtures of azo dyestuffs (cf. DE-A3,347,572=U.S. Pat. No. 4,608,050).

In addition blends of the expensive anthraquinone dyestuff withinexpensive azo dyestuffs as well as mixtures of other anthraquinonedyestuffs with azo compounds have been recommended as "Blue 56substitutes" (cf. DE-A 3,023,330=U.S. Pat. No. 4,374,642 and DE-A3,043,184).

Apart from the fact that these blends represent a step in the wrongdirection by the very nature of the problems they attempt to solve, noneof the abovementioned proposals have succeeded in completely replacingDisperse Blue 56, since the substitute products do not attain the highquality of the anthraquinone dyestuff.

It has now been found that a substitute product for Disperse Blue 56which is equal and to some extent considerably superior in virtually allimportant properties can be obtained by using a dyestuff combinationwith a hue angle of 290°-300°, preferably 293°-297°, which combinationis characterised in that it contains

a) at least one dyestuff of the formula (I) ##STR2## and b) at least onedyestuff of the formulae II-IV ##STR3## wherein--independently of oneanother-- X denotes Cl or Br,

Y denotes NO₂ or CN,

W denotes alkyl, aralkyl or alkoxyalkyl,

V denotes H, alkyl, aryl or alkoxy,

R₁ denotes alkyl, aralkyl, alkoxyalkyl or alkenyl,

R₂ denotes R₁, chloroalkyl, aryloxyalkyl or alkoxycarbonylalkyl,

R₃ denotes alkyl, aralkyl, alkoxyalkyl, hydroxyalkyl, aryloxyalkyl oralkenyl,

R₄ denotes R₃, C₂ -C₄ -chloroalkyl or alkoxycarbonylalkyl,

R₅ denotes alkyl, alkenyl or aralkyl

R₆ denotes R₅ or alkoxyalkyl,

R₇ denotes alkyl, aralkyl, alkoxyalkyl, hydroxyalkyl, aryloxyalkyl,chloroalkyl, alkoxycarbonylalkyl, alkenyl or acyloxyalkyl and

R₈ denotes R₇,

wherein acyl radicals are alkylcarbonyl or arylcarbonyl radicals, alkyl,alkenyl and alkoxy radicals, in whatever connection they are mentioned,are those containing 1-4 C-atoms, and aryl radicals, in whateverconnection they are mentioned, are phenyl radicals which can besubstituted by Cl or C₁ -C₄ -alkyl.

Preferred dyestuffs are those of the abovementioned formulae, in which

Y denotes NO₂ or CN,

X denotes Cl or Br,

W denotes alkyl or alkoxyalkyl,

V denotes alkyl, aryl or alkoxy,

R₁ denotes alkyl, alkoxyalkyl or alkenyl,

R₂ denotes R₁, aralkyl or aryloxyalkyl,

R₃ denotes alkyl, aralkyl, alkoxyalkyl or alkenyl,

R₄ denotes R₃,

R₅ denotes alkyl or alkenyl,

R₆ denotes alkyl, alkenyl or aralkyl,

R₇ denotes alkyl, aralkyl, alkoxyalkyl, aryloxyalkyl or alkenyl and

R₈ denotes R₇, the abovementioned radicals having the specific meaningsstated above.

Particularly preferred dyestuffs are those of the abovementioned formulain which

Y denotes NO₂ or CN,

X denotes Cl or Br,

W denotes alkyl,

V denotes alkyl,

R₁ denotes alkyl,

R₂ denotes R₁, alkoxyalkyl or aralkyl,

R₃ denotes alkoxyalkyl,

R₄ denotes R₃ or alkyl,

R₅ denotes alkyl,

R₆ denotes R₅,

R₇ denotes alkyl and

R₈ denotes R₇ or alkoxyalkyl,

the abovementioned radicals having the specific meanings stated above.

Particularly suitable dyestuffs are those of the formulae I-IV in which

Y denotes CN,

X denotes Br or Cl,

W denotes methyl,

V denotes methyl or ethyl,

R₁ and R₂ denote ethyl, n-propyl or n-butyl,

R₃ and R₄ denote methoxyethyl,

R₅ and R₆ denote ethyl or n-propyl and

R₇ and R₈ denote ethyl or n-propyl.

The dyestuffs of the formulae I-IV are known or can be obtained easilyby known methods and are described for example in the following patentliterature: DE-A 1,290,915=U.S. Pat. No. 4,105,655; DE-A 3,425,127=U.S.Pat. No. 4,681,932; DE-A 2,818,653=GB-A 1,582,743; DE-A 2,304,218=U.S.Pat. No. 4,079,050.

The individual dyestuffs listed in the following tables can be mentionedas examples.

                                      TABLE 1                                     __________________________________________________________________________    Dyestuffs of formula I                                                        R.sub.1    R.sub.2             R.sub.1     R.sub.2                            __________________________________________________________________________    CH.sub.3   CH.sub.3            C.sub.2 H.sub.5                                                                           CH.sub.2CH.sub.2OCH.sub.3          CH.sub.3   C.sub.2 H.sub.5     C.sub.2 H.sub.5                                                                           CH.sub.2CH.sub.2OC.sub.2                                                      H.sub.5                            CH.sub.3   CH.sub.2CH.sub.2CH.sub.3                                                                          C.sub.2 H.sub.5                                                                           CH.sub.2CH.sub.2OCH.sub.2CH.sub                                               .2CH.sub.3                         CH.sub.3   CH(CH.sub.3).sub.2  C.sub.2 H.sub.5                                                                           CH.sub.2CH.sub.2Cl                 CH.sub.3   CH.sub.2CH.sub.2CH.sub.2CH.sub.3                                                                  C.sub.2 H.sub.5                                                                            ##STR4##                          CH.sub.3   CH.sub.2CHCH.sub.2  C.sub.2 H.sub.5                                                                            ##STR5##                          CH.sub.3                                                                                  ##STR6##           C.sub.2 H.sub.5                                                                            ##STR7##                          CH.sub.3                                                                                  ##STR8##                                                          CH.sub.3   CH.sub.2CH.sub.2OCH.sub.3                                                                         CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2CH.sub.3           CH.sub.3   CH.sub.2CH.sub.2OC.sub.2 H.sub.5                                                                  CH.sub.2CH.sub.2CH.sub.3                                                                  CH(CH.sub.3).sub.2                 CH.sub.3   CH.sub.2CH.sub.2OCH.sub.2CH.sub.2CH.sub.3                                                         CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2CH.sub.2CH.sub.                                               3                                  CH.sub.3   CH.sub.2CH.sub.2Cl  CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CHCH.sub.2                 CH.sub.3                                                                                  ##STR9##           CH.sub.2CH.sub.2CH.sub.3                                                                   ##STR10##                         CH.sub.3                                                                                  ##STR11##          CH.sub.2CH.sub.2CH.sub.3                                                                   ##STR12##                         CH.sub.3                                                                                  ##STR13##          CH.sub.2CH.sub. 2CH.sub.3                                                                 CH.sub.2CH.sub.2OCH.sub.3          C.sub.2 H.sub.5                                                                          C.sub.2 H.sub.5     CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2OC.sub.2                                                      H.sub.5                            C.sub.2 H.sub.5                                                                          CH.sub.2CH.sub.2CH.sub.3                                                                          CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2OCH.sub.2CH.sub                                               .2CH.sub.3                         C.sub.2 H.sub.5                                                                          CH(CH.sub.3).sub.2  CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2Cl                 C.sub.2 H.sub.5                                                                          CH.sub.2CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2CH.sub.2CH.sub.3                                                                   ##STR14##                         C.sub.2 H.sub.5                                                                          CH.sub.2CHCH.sub.2  CH.sub.2CH.sub.2CH.sub.3                                                                   ##STR15##                         C.sub.2 H.sub.5                                                                           ##STR16##          CH.sub.2CH.sub.2CH.sub.3                                                                   ##STR17##                         C.sub.2 H.sub.5                                                                           ##STR18##                                                         CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                         CH(CH.sub.3).sub.2  CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                          CH.sub.2CH.sub.2OC.sub.2                                                      H.sub.5                            CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                         CH.sub.2CH.sub.2CH.sub.2CH.sub.3                                                                  CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                          CH.sub.2CH.sub.2OCH.sub.2CH.sub                                               .2CH.sub.3                         CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                         CH.sub.2CHCH.sub.2  CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                          CH.sub.2CH.sub.2Cl                 CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                          ##STR19##          CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                           ##STR20##                         CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                          ##STR21##          CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                           ##STR22##                         CH.sub.2(CH.sub.2).sub.2CH.sub.3                                                         CH.sub.2CH.sub.2OCH.sub.3                                                                         CH.sub.2(CH.sub.2 ).sub.2CH.sub.3                                                          ##STR23##                         __________________________________________________________________________

                  TABLE 2                                                         ______________________________________                                        Dyestuffs of formula II                                                       V          R.sub.3        R4                                                  ______________________________________                                        CH.sub.3   CH.sub.3       CH3                                                 CH.sub.3   C.sub.2 H.sub.5                                                                              C2H5                                                CH.sub.3   CH.sub.2 --CH.sub.2 --CH.sub.3                                                               CH.sub.2 --CH.sub.2 --CH3                           CH.sub.3   C.sub.2 H.sub.5                                                                              CH2--CH2--O--CH3                                    CH.sub.3   C.sub.2 H.sub.5                                                                              CH2--CH2--O--                                                                 C2H5                                                CH.sub.3   --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--CH3                        CH.sub.3   --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--                                                     C2H5                                                CH.sub.3   CH.sub.2 --CH.sub.2 --OCH.sub.3                                                              CH.sub.2 --CH.sub.2 --OCH3                          CH.sub.3   CH.sub.2 --CH.sub.2 --O--C.sub.2 H.sub.5                                                     CH.sub.2 --CH.sub.2 --OC2H5                         C.sub.2 H.sub.5                                                                          CH.sub.3       CH3                                                 C.sub.2 H.sub.5                                                                          C.sub.2 H.sub.5                                                                              C2H5                                                C.sub.2 H.sub.5                                                                          CH.sub.2 --CH.sub.2 --CH.sub.3                                                               CH.sub.2 --CH.sub.2 --CH3                           C.sub.2 H.sub.5                                                                          C.sub.2 H.sub.5                                                                              CH2--CH2--O--CH3                                    C.sub.2 H.sub. 5                                                                         C.sub.2 H.sub.5                                                                              CH2--CH2--O--                                                                 C2H5                                                C.sub.2 H.sub.5                                                                          --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--CH3                        C.sub.2 H.sub.5                                                                          --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--                                                     C2H5                                                C.sub.2 H.sub.5                                                                          CH.sub.2 --CH.sub.2 --OCH.sub.3                                                              CH.sub.2 --CH.sub.2 --OCH3                          C.sub.2 H.sub.5                                                                          CH.sub.2 --CH.sub.2 --O--C.sub.2 H.sub.5                                                     CH.sub.2 --CH.sub.2 --OC2H5                         CH.sub.2 --CH.sub.2 --CH.sub.3                                                           CH.sub.3       CH3                                                 CH.sub.2 --CH.sub.2 --CH.sub.3                                                           C.sub.2 H.sub.5                                                                              C2H5                                                CH.sub.2 --CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --CH.sub.3                                                               CH.sub.2 --CH.sub.2 --CH3                           CH.sub.2 --CH.sub.2 --CH.sub.3                                                           C.sub.2 H.sub.5                                                                              CH2--CH2--O--CH3                                    CH.sub.2 --CH.sub.2 --CH.sub.3                                                           C.sub.2 H.sub.5                                                                              CH2--CH2--O--                                                                 C2H5                                                CH.sub.2 --CH.sub.2 --CH.sub.3                                                           --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 -- O--CH3                       CH.sub.2 --CH.sub.2 --CH.sub.3                                                           --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--                                                     C2H5                                                CH.sub.2 --CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --OCH.sub.3                                                              CH.sub.2 --CH.sub.2 --OCH3                          CH.sub.2 --CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --O--C.sub.2 H.sub.5                                                     CH.sub.2 --CH.sub.2 --OC2H5                         CH.sub.2 --CH.sub.2 --                                                                   CH.sub.3       CH3                                                 CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   C.sub.2 H.sub.5                                                                              C2H5                                                CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   CH.sub.2 --CH.sub.2 --CH.sub.3                                                               CH.sub.2 --CH.sub.2 --CH3                           CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   C.sub.2 H.sub.5                                                                              CH2--CH2--O--CH3                                    CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   C.sub.2 H.sub.5                                                                              CH2--CH2--O--                                       CH.sub.2 --CH.sub.3       C2H5                                                CH.sub.2 --CH.sub.2 --                                                                   --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 -- O--CH3                       CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   --(CH.sub.2).sub.2 --CH.sub.3                                                                CH.sub.2 --CH.sub.2 --O--                           CH.sub.2 --CH.sub.3       C2H5                                                CH.sub.2 --CH.sub.2 --                                                                   CH.sub.2 --CH.sub.2 --OCH.sub.3                                                              CH.sub.2 --CH.sub.2 --OCH3                          CH.sub.2 --CH.sub.3                                                           CH.sub.2 --CH.sub.2 --                                                                   CH.sub.2 --CH.sub.2 --O--C.sub.2 H.sub.5                                                     CH.sub.2 --CH.sub.2 --OC2H5                         CH.sub.2 --CH.sub.3                                                           ______________________________________                                    

                  TABLE 3                                                         ______________________________________                                        Dyestuffs of formula III                                                      V         W      R.sub.5      R.sub.6    X                                    ______________________________________                                        CH.sub.3  CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Cl                                   CH.sub.3  CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Cl                                   CH.sub.3  CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Br                                   CH.sub.3  CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Br                                   C.sub.2 H.sub.5                                                                         CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Cl                                   C.sub.2 H.sub.5                                                                         CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Br                                   C.sub.2 H.sub.5                                                                         CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Cl                                   C.sub.2 H.sub.5                                                                         CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Br                                   CH.sub.2 --CH.sub.2 --                                                                  CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Cl                                   CH.sub.3                                                                      CH.sub.2 --CH.sub.2 --                                                                  CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Br                                   CH.sub.3                                                                      CH.sub.2 --CH.sub.2 --                                                                  CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Cl                                   CH.sub.3                                                                      CH.sub.2 --CH.sub.2 --                                                                  CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Br                                   CH.sub.3                                                                      --(CH.sub.2).sub.3 --CH.sub.3                                                           CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Cl                                   --(CH.sub.2).sub.3 --CH.sub.3                                                           CH.sub.3                                                                             C.sub.2 H.sub.5                                                                            C.sub.2 H.sub.5                                                                          Br                                   --(CH.sub.2).sub.3 --CH.sub.3                                                           CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Cl                                   --(CH.sub.2).sub.3 --CH.sub.3                                                           CH.sub.3                                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                           Br                                   ______________________________________                                    

                  TABLE 4                                                         ______________________________________                                        Dyestuffs of formuIa IV                                                       V           R.sub.7       R.sub.8                                             ______________________________________                                        CH.sub.3    C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                     C.sub.2 H.sub.5                                                                           C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                     CH.sub.2 --CH.sub.2 --CH.sub.3                                                            C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                     (CH.sub.2).sub.3 --CH.sub.3                                                               C.sub.2 H.sub.5                                                                             C.sub.2 H.sub.5                                     CH.sub.3    CH.sub.2 --CH.sub.2 --CH.sub.3                                                              CH.sub.2 --CH.sub.2 --CH.sub.3                      C.sub.2 H.sub.5                                                                           CH.sub.2 --CH.sub.2 --CH.sub.3                                                              CH.sub.2 --CH.sub.2 --CH.sub.3                      CH.sub.2 --CH.sub.2 --CH.sub.3                                                            CH.sub.2 --CH.sub.2 --CH.sub.3                                                              CH.sub.2 --CH.sub.2 --CH.sub.3                      --(CH.sub.2).sub.3 --CH.sub.3                                                             CH.sub.2 --CH.sub.2 --CH.sub.3                                                              CH.sub.2 --CH.sub.2 --CH.sub.3                      CH.sub.3    CH.sub.2 --CH.sub.2 --CH.sub.3                                                              --CH.sub.2 --CH.sub.2 --OCH.sub.3                   CH.sub.3    CH.sub.2 --CH.sub.2 --CH.sub.3                                                              --CH.sub.2 --CH.sub.2 --OC.sub.2                    ______________________________________                                                                  H.sub.5                                         

The proportion by weight of the individual mixture components in themixture according to the invention is, in general:

20 to 90% of component I,

0 to 80% of component II,

0 to 80% of component III and

0 to 80% of component IV

with the proviso that at least one of dyestuffs II to IV makes up 100%together with dyestuff I.

In another type of mixture the proportions are as follows:

10 to 90% of component I,

10 to 80% of component III and

10 to 80% of component IV.

Two component mixtures of I with II, III or IV in the followingproportions.

a) 25 to 80% of component I, 20 to 75% of component II,

b) 25 to 80% of component I, 20 to 75% of component III,

c) 30 to 90% of component I, 10 to 70% of component IV,

are preferred.

Particularly preferred mixtures are those of dye-stuff A with dyestuffsB, C and D: ##STR24## the following mixing ratios being preferred: a) 10to 90% dyestuff A, 10 to 90% dyestuff B.

b) 50 to 70% dyestuff A, 30 to 50% dyestuff B.

c) 55 to 65% dyestuff A, 35 to 45% dyestuff B.

d) 40 to 70% dyestuff A, 15 to 45% dyestuff B, 5 to 30% dyestuff C.

e) 40 to 70% dyestuff A, 15 to 45% dyestuff B, 5 to 20% dyestuff D.

f) 50 to 75% dyestuff A, 10 to 35% dyestuff C, 5 to 30% dyestuff D.

g) 45 to 75% dyestuff A, 30 to 60% dyestuff C.

h) 52 to 64% dyestuff A, 38 to 48% dyestuff C.

i) 60 to 85% dyestuff A, 15 to 40% dyestuff D.

The new dyestuff mixtures can be produced by various methods:

1. by mixing the separately prepared and formulated individualcomponents, or

2. by jointly formulating the separately prepared individual dyestuffcomponents.

The "cyanation" of ortho-halogen azo dyestuffs and the dicyan dyestuffsthereby obtained are--as such--generally known (cf. DE-A 1,544,563=U.S.Pat. No. 3,962,209 and DE-A 3,009,635).

The formulating process for producing marketable preparations is alsocarried out by methods known per se.

The new dyestuff mixtures are particulary suitable for dyeing polyesterand cellulose ester fibres and produce very bright reddish blue dyeingswith very good light and wash fastness properties.

An additional advantage is the low degree of soiling of adjacent fabricsin the dyeing of polyester mixed fabrics.

In the following examples "parts" and "%" denote parts by weight andpercentage by weight, respectively.

EXAMPLE 1

A dyeing preparation of

11.2 parts of dyestuff A,

9.9 parts of dyestuff B,

25.6 parts of a commercially available lignin sulphonate

46.4 parts of a commercially available dispersing agent (for example acondensation product of formaldehyde, naphthalene and sulphuric acid),

0.2 parts of a commercially available wetting agent,

0.7 parts of a commercially available dedusting agent and

6.0 parts of residual mixture,

is produced by bead-milling and subsequent spray drying.

100 parts of a polyester fabric (polyethylene terephthalate) are dyedfor 30 to 45 minutes at 125° to 130° C. with 1.3 g of the dyestuffpreparation described above in a dye bath which has been adjusted to apH value of 4.5 with sodium phosphate and acetic acid (liquor ratio 1:10to 1:40).

Bright reddish-blue dyeings with good fastness properties are obtained.

EXAMPLE 2

100 parts of a polyester fabric are dyed for 30 minutes at 90° to 105°C. with 1.3 parts of the dyestuff preparation described above in a dyebath which contains 5 g/l of a commercially available carrier (forexample based on aromatic carboxylic esters) and has been adjusted to apH of 4.5 with sodium phosphate and acetic acid. Full, deep blue dyeingswith good fastness properties are obtained.

EXAMPLE 3

200 parts of a polyester/(polyethylene terephthalate) cotton mixedfabric 50/50 are dyed for 30 to 45 minutes at 125° to 135° C. with 1.3parts of the dye preparation described above in a dye bath which hasbeen adjusted to a pH of 4.5 with sodium phosphate and acetic acid(liquor ratio 1:10 to 1:40). Bright blue dyeings with good fastnessproperties are obtained, the adjacent cotton material being onlyslightly soiled.

EXAMPLE 4

200 parts of a polyester/wool mixed fabric 50/50 are dyed for 30 minutesat 90° to 105° C. with 1.3 parts of the dyestuff preparation describedabove in a dye bath which contains 5 g/l of a commercially availablecarrier (for example based on aromatic carboxylic esters) and has beenadjusted to a pH of 4.5 with sodium phosphate and acetic acid. Full,deep blue dyeings with good fastness properties are obtained.

Similar results are obtained using the following mixtures:

EXAMPLE 5

55% of dyestuff I (in which R₁ and R₂ =n-butyl)

45% of dyestuff B

EXAMPLE 6

59% of dyestuff A

41% of dyestuff B

EXAMPLE 7

55% of dyestuff A

31% of dyestuff B

14% of dyestuff C

EXAMPLE 8

60% of dyestuff A

31% of dyestuff B

9% of dyestuff D

EXAMPLE 9

66% of dyestuff A

22% of dyestuff C

12% of dyestuff D

EXAMPLE 10

60% of dyestuff A

40% of dyestuff C

EXAMPLE 11

72% of dyestuff A

28% of dyestuff D

EXAMPLE 12

62% of dyestuff A

38% of dyestuff B

EXAMPLE 13

53% of dyestuff A

47% of dyestuff B

We claim:
 1. A mixture of azo disperse dyestuffs having a hue angleh_(ab) of 290° to 300°, based on a polyester dyeing in a 1/1 standarddepth of shade according to DIN 5033/Part 3, comprisinga) at least onedyestuff of the formula (I) ##STR25## and b) at least one dyestuffselected from the group consisting of compounds of the formula ##STR26##wherein, independently of one another, Y denotes NO₂ or CN, V denotesalkyl, or alkoxy, R₁ denotes alkyl, or alkoxyalkyl, R₂ denoteschloralkyl, aryloxyalkyl, alkoxycarbonylalkyl, alkyl, aralkyl,alkoxyalkyl or alkenyl, R₃ denotes alkyl, aralkyl, alkoxyalkyl, oraryloxyalkyl, R₄ denotes alkoxycarbonylalkyl, alkyl oralkoxyalkyl,wherein alkyl, alkenyl and alkoxy radicals, in whateverconnection they are mentioned, are those with 1-4 C-atoms and arylradicals, in whatever connection they are mentioned, are phenyl radicalswhich are unsubstituted or substituted by Cl or C₁ -C₄ -alkyl.
 2. Amixture of azo disperse dyestuffs according to claim 1, whereinY denotesNO₂ or CN, V denotes alkyl, R₁ denotes alkyl, R₂ denotes R₁, alkoxyalkylor aralkyl, R₃ denotes alkoxyalkyl, R₄ denotes alkyl or alkoxyalkyl,theabove mentioned radicals having the specific meanings stated above.
 3. Amixture of azo disperse dyestuffs according to claim 1, wherein in theformulae mentioned thereinY denotes CN, V denotes ethyl or methyl, R₁and R₂ denote ethyl, n-propyl or n-butyl and R₃ and R₄ denotemethoxyethyl.
 4. A mixture of azo disperse dyestuffs according to claim1, wherein the proportion by weight of component I is 20 to 90% and thatof component II is 10 to 80% with the proviso that the dyestuff II makesup 100% together with dyestuff I.
 5. A mixture of azo disperse dyestuffsaccording to claim 1, wherein the proportion by weight of component I is20 to 90% and that of component II is 10 to 80%.
 6. A mixture of azodisperse dyestuffs according to claim 1, wherein the proportion byweight of component I is 25 to 80% and that of component II is 20 to75%.
 7. A mixture of the azo disperse dyestuffs according to claim 1,comprising a dyestuff of the formula (A) ##STR27## and a dyestuff of theformula (B) ##STR28##